That is super nice! 1909 Peruvian to small ring?

Looks like an 03 Turk to me.

Very nice work; that is the way things are done.
Can I see a pic of your rotary table setup? Please.

quote:

Originally posted by Redoak8:
Looks like an 03 Turk to me.

More likely a Czech(large ring) or FN Peruvian Mauser.
Though of the same configuration as the Turk

Not a Cxech; looks like a high bridge clip guide is the key to ID this one. And it looks like a small thread anyway.

Thanks for the comments guys.

Jim, not really sure how much material I took off, I did not make up a blueprint when done. Just blended everything together by eye, put the "Kurz" cut in, and some draft on the bottom of the action. Cutters varied, I used 3 or 4 during different parts of the job. Most were standard cutters, w/rad on the corners.

It is a Oberndorf Turkish 03 (LR/ST) taken do to a small ring.

dpcd, I will have to get back to you on the pictures. I did not take any of the setup when doing this job, but can take pictures of a few of the tools I use, if you would like.

Very nice work, Nathaniel.
Looks like the action was not annealed, so no issues getting under the harder surface skin?
Cleaned up on surface grinder or the old fashioned way with files and stones?
All the work was done on non-functional cosmetic surfaces but curious if you plan to have it heat treated?

Yes, thank you.

I thought I remember there were good reasons to not turn a large ring/small shank action down to small ring dimensions. Something about the thread relief cut by the inner C-ring being deeper than the threads themselves, and this creating a weak area...

Can anybody confirm or deny this? It might only apply to certain actions.

Otherwise this seems like a great way to make a custom small ring 98.

And nice work by the way, would love to see more progress pictures.

gzig, no issues with the case hardening. I have the joy (sarcasm) of often milling hardened tool steel at work. CPM-M4 at 62Rc takes some care and effort. Carbide takes care of the case with ease.

As you see the action is was surface ground then rubbed down with some scotch brite. When the final finish work is completed it will get some up close and personal time with files, stones, and emery cloth.

At this point and time, we are not planning on having it re-cased.

Montea, this would be news to me, and I would be quite interested in hearing the specifics. I had a good friend take some measurements off of a 1903 that had been cut in half before proceeding. I don't pretend to be an engineer, but I did not see anything that concerned me.

Original plans were for it to be a 7x64, however it was decided to chamber in 7x57, put the rifle through its paces, then if desired, step it up to 7x64.

Dpcd, it may be a little bit, but when I cut the integral qtr rib and 1/2 round taper I will get you some pictures of setups.

quote:

Originally posted by montea6b:
I thought I remember there were good reasons to not turn a large ring/small shank action down to small ring dimensions. Something about the thread relief cut by the inner C-ring being deeper than the threads themselves, and this creating a weak area...

Can anybody confirm or deny this? It might only apply to certain actions.

Otherwise this seems like a great way to make a custom small ring 98.

And nice work by the way, would love to see more progress pictures.

I heard that with the k kales as the thread relief cut is deeper. I don't see an issue with the intermediate one like the Turk and the Peruvian.
Don

quote:

Originally posted by montea6b:
I thought I remember there were good reasons to not turn a large ring/small shank action down to small ring dimensions. Something about the thread relief cut by the inner C-ring being deeper than the threads themselves, and this creating a weak area...

Can anybody confirm or deny this? It might only apply to certain actions.

Otherwise this seems like a great way to make a custom small ring 98.

And nice work by the way, would love to see more progress pictures.

I recall being told this being a reason not use German Kar98 small-ring large-thread actions. Can anyone confirm this? Thanks,
Matt

Matt,

I do recall that advice, from ZLR, I believe. But seems like there were a few more questionable actions, as well, and maybe some of the LR - ST ones, as indicated above.

That thread should be here on AR somewhere...

I have never had any problems with small ring, big thread German and Polish K98 receivers. If anyone has any specific accounts of problems (none of this "I heard somewhere I think" stuff), please post them. Hell, the Mauser factory said there was no problem with that huge scope mount dovetail on the large receiver ring. If that would not weaken a 98, a small ring won't. (I am not talking about small ring 93s and 95s; or 96 Swedes without inner rings.)

The way I remember it explained is that some large ring/small thread Mausers used the same tooling/setup to make the inner relief cut as they did in the large ring/large thread actions. Therefore, the relief cut was to large thread depth, even though the threads were small.

So, if one ground a large ring/small thread action down to small ring OD, the metal left in that particular place would be the same as if you turned a large ring/large thread action down to small ring OD.

I have never heard of any problems, and if you are OK with that practice then I guess it isn’t an issue.

I think I might see the bullet nose notch in the rear of the receiver ring in the 2nd pic.

Did you weld it up or leave it?

montea,

I was going to go check and do some measuring, but my shop was 40*, with both heaters going full blast. Hopefully this weekend I will be able to spend some time in the shop. If I do, I will try to confirm or deny this potential issue.

Doug, yes, there is a bullet nose notch in the front ring that was left intact. For some reason it didn't seem right to weld it up. Once I get the scope base blanks made we are going to re-consider its existence.